Well it looks like the operator was at full throttle on "hold" on the rollers before he pressed "ramp", as its at roughly atmpospheric when the run started, so it doesnt look like operator error, which can sometimes be the cause of a turbo spooling late.


Have you watched the boost gauge in the car to see when it actually comes in when in use on the road?


Actuator would certainly be a sensible place to start, but so would talking to stu about the chip, it is possible after all that its deliberately mapped that way to try and save the box for example, although I would be surprised if that was the case, but its possible so you need to know what the ecu is trying to achieve boost wise in the first place.